Welcome to the Australia Telescope Compact Array

The Australia Telescope Compact Array (ATCA), at the Paul Wild
Observatory, is an array of six 22-m antennas used for radio astronomy. It is located
about 25 km west of the town of Narrabri in rural NSW (about 500 km north-west of
Sydney). It is operated by CSIRO's
Astronomy and Space Science division,
as are the Parkes Observatory
and the Mopra Observatory near Coonabarabran.
A fourth radio telescope, the
Australian Square Kilometre Array Pathfinder,
is also being developed by CSIRO at the Murchison Radio-astronomy Observatory
in the Mid-West of Western Australia. Collectively, CSIRO's radio astronomy
observatories are known as the Australia Telescope National Facility,
with the facility supporting Australia's research in radio astronomy.